Re: Power consumption HZ100, HZ250, HZ1000: new numbers

[Lee Revell <rlrevell@joe-job.com>]

On Mon, 2005-08-01 at 00:36 +0200, Pavel Machek wrote:
> Hi!
> 
> > > > I really like having 250HZ as an _option_, but what I don't see is why 
> > > > it should be the _default_.  I believe this is Lee's position as
> > > > Last I checked, ACPI and CPU speed scaling were not enabled by default; 
> > > 
> > > Kernel defaults are irelevant; distros change them anyway. [But we
> > > probably want to enable ACPI and cpufreq by default, because that
> > > matches what 99% of users will use.]
> > > 
> > 
> > If the kernel defaults are irrelevant, then it would make more sense to
> > leave the default HZ as 1000 and not to enable the cpufreq and ACPI in
> > order to keep with the principle of least surprise for people who do use
> > kernel.org kernels.
> 
> Well, I'd say you want ACPI enabled. New machine do not even boot
> without that. Default config should be usefull; set ACPI off, and
> you'll not be able to even power machine down.

While it's good to be future proof, I don't think it's valid to assume
that new kernels usually run on new hardware.

Lee